877681 has 4 divisors (see below), whose sum is σ = 1003072. Its totient is φ = 752292.

The previous prime is 877661. The next prime is 877699. The reversal of 877681 is 186778.

It is a happy number.

877681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 877681 - 2⁹ = 877169 is a prime.

It is a super-2 number, since 2×877681² = 1540647875522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 877681.

It is not an unprimeable number, because it can be changed into a prime (877601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62685 + ... + 62698.

It is an arithmetic number, because the mean of its divisors is an integer number (250768).

2⁸⁷⁷⁶⁸¹ is an apocalyptic number.

It is an amenable number.

877681 is a deficient number, since it is larger than the sum of its proper divisors (125391).

877681 is a wasteful number, since it uses less digits than its factorization.

877681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125390.

The product of its digits is 18816, while the sum is 37.

The square root of 877681 is about 936.8463054312. The cubic root of 877681 is about 95.7441465562.

The spelling of 877681 in words is "eight hundred seventy-seven thousand, six hundred eighty-one".